ABSTRACT During the construction of box jacking tunnel, stress transfer caused by soil arching effect is an important factor, affecting force. This study proposes a force prediction method for tunnels under complete and incomplete in sandy soils, which divided into three domains, i.e., external stable region, elastic arch, internal loosened body. Three‐dimensional numerical analyses tunnel at various cover depths are also investigated to show changes around evolution arch formation. Finally,...

This study proposes a form of concrete-filled steel tube column with multiple-chamber round-ended cross-section (M-CFST). Longitudinal and transverse stiffening ribs divide the circular-ended section into different chambers, strengthening tube’s confinement effect on core concrete improving component’s seismic performance. A three-dimensional finite element (FE) solid model M-CFST is created by employing FE software ABAQUS. Quasi-static analysis conducted to investigate influence parameters,...

Concrete-filled round-ended steel tubes (CFRTs) are a unique type of composite stub columns, which have the advantage aesthetics and well-distributed major–minor axis. Thus, structure has been widely employed as piers columns in bridges. To improve mechanical performance CFRTs with large length–width ratio to enhance restraint effect on concrete, this study investigates compressive property multi-chamber, concrete-filled, tubular (M-CFRT) using combination experimental numerical analyses. A...

This study investigates the flexural strength of simply supported steel‐concrete composite beams under hogging moment. A total 24 are included in experiments, and ABAQUS software is used to establish finite element (FE) models that can simulate mechanical properties beams. In a parametric study, influences several major parameters, such as shear connection degree, stud arrangement diameter, longitudinal transverse reinforcement ratios, loading manner, beam length, on were investigated....

This paper investigates the flexural capacity of simply supported steel-concrete composite I beam and box under positive bending moment through combined experimental finite element (FE) modeling. 24 beams are included into experiments parameters including shear connection degree, transverse reinforcement ratio, section form girder, diameter stud loading way also considered investigated. ABAQUS is employed to establish FE models simulate behavior beams. The influences a few key parameters,...

This paper investigates the flexural stiffness of simply supported steel-concrete composite I-beams under positive bending moment through combined experimental, numerical, and different standard methods. 14 beams are tested for experimental study parameters including shear connection degree, transverse longitudinal reinforcement ratios, loading way also investigated. ABAQUS is employed to establish finite element (FE) models simulate behavior beams. The influences a few key parameters, such...

Reinforced concrete bridge piers with round-ended sections are susceptible to bending, bending–shear, and shear failure after earthquakes in high-intensity areas, thus necessitating improved seismic performance. This study introduced a novel design for concrete-filled steel tube (CFST) column, featuring multi-chambered, cross-section. The use of longitudinal transverse stiffeners divided the column section into distinct chambers, thereby enhancing performance columns. A total 12 groups...

To study the mechanical performance of bolted connections with different structural forms reinforced rings, based on results monotonic loading tests two between a concrete-filled steel tubular column and beam an outer reinforcing ring, this article uses ABAQUS v.2020 software to establish three-dimensional refined finite element analysis model such using appropriate constitutive models for concrete steel. Subsequently, effect dimensions beam, cover plate load-bearing properties failure...

This article presents the experimental and finite element (FE) analyses of two conventional rectangular concrete‐filled steel tubular (CFT) stub columns, stiffened (SCFT) stirrup confinement (CCFT) columns concentrically loaded in compression to failure. The influences ductility ultimate bearing strength these with stiffening ribs or spiral were discussed. Abaqus was used establish a 3D FE model analyze properties CFT subjected axial compression. effect concrete core tube under loop...

Deep learning is one of the key topics research today. Researchers have found that deep algorithms developed rapidly in recent years, and this paper aims to apply practical problems civil engineering. Therefore, paper, we take images particles on a construction site segment using YOLO model, then calculate grading curves detection model. It use curve rapid convenient compared with traditional experimental methods; accuracy slightly flawed methods. With advancement hardware upgrading, method...

Simple supported-to-continuous girder bridges are commonly and widely used in bridge engineering China.For this type of bridges, normally, the longitude connections casted in-site by concrete.The quality concrete is difficult to control.After a large number field surveys, damages often found transversal longitudinal connections.These may result unfavorable effects system shorten durability bridges.Therefore it great interests investigate behavior concoctions on kind bridges.This paper...